Last name Bärn (Bern 
, Bärn) , around the world, is quite a common cognomen. The last name Bärn is habitual in Switzerland, where it is quite a common surname, Norway, where it is quite a rare surname, and Sweden. Measured by absolute frequency, it is commonest in the United States, Switzerland, and Germany. Also, Bärn is the forename as well as the last name.